System for flood proofing residential and light commercial buildings

ABSTRACT

Flood proofing of buildings built on a slab is provided. Water having a depth less than a selected distance H above the slab is excluded from the building by windows, doors and panels that are sealed to prevent water entry. The panels may be applied over a variety of existing veneer materials or may be used in new construction.

BACKGROUND OF INVENTION

1. Field of the Invention

This invention relates to protecting wood frame and light gauge steelframe buildings from damage by flood water intrusion into the interiorof the building. More particularly, method and materials for preventingwater from passing through walls, windows and window openings and doorsand door openings of buildings are provided.

2. Description of Related Art

According to the Federal Emergency Management Administration of the U.S.government (FEMA) and the National Flood Insurance Program (NFIP), flashflooding is the most common natural disaster in the U.S. One-third offlood loss claims paid are in “low-risk” areas, and the average floodloss claim payment is $42,000.

For many years, flood protection methods have been developed and used inprotection of commercial, institutional and high-rise multi-familyresidential buildings. Temporary flood barriers and gates have beendeveloped as an improvement to sand bags to keep rising surface waterout of buildings, but there is a need for a “passive” method andcorresponding materials for flood proofing wood frame and light-gaugesteel frame buildings. A passive method of flood protection is definedas one that does not require human intervention to prevent interiorflooding of a building during an unexpected flood event—one thatprevents intrusion of rising water into an exterior building envelope.Such method and materials should be applicable to retrofit existingresidences, small commercial buildings and other types of structuresthat are built on concrete slabs and that utilize wood structuralframing or light-gauge steel framing in exterior walls. In addition,such method and materials should be applicable to various veneer wallfinish materials, i.e. masonry, stucco, and wood or composite sidingmaterials or to new construction.

BRIEF SUMMARY OF THE INVENTION

Method and materials are provided for sealing the exterior of a buildingbuilt on a concrete slab to a selected height above the slab. Windowframes are sealed and special construction of windows extending belowthe selected height is provided. Door frames are sealed and specialconstruction of doors extending below the selected height is provided.Doors open outwardly from the building walls. Walls are sealed bywaterproof panels that are sealed to the slab.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is a typical front elevation view of a house having a masonryveneer substrate that has been flood protected using method andmaterials disclosed herein.

FIG. 2 is a perspective view of a wall and window, with a cut-away viewof the wall over a masonry veneer substrate.

FIG. 3 is a detailed cross-section view of a window and frame disclosedherein.

FIG. 4 is an elevation view of the exterior door disclosed herein.

FIG. 5A is a lower cross-section view of the exterior door and framedisclosed herein. FIG. 5B is an enlarged cross-section view of theexterior door showing gasket seals.

FIG. 6 is a perspective view of a masonry veneer substrate wall withflood proofing wainscot and an exterior door.

FIG. 7 is a perspective cut-away view of a masonry veneer wall substratemade flood proof according to one embodiment of method and materialsdisclosed herein.

FIG. 8 is a perspective cut-away view of a horizontal siding wallsubstrate made flood proof according to one embodiment of method andmaterials disclosed herein.

FIG. 9 is a perspective cut-away view of a stucco wall substrate madeflood proof according to one embodiment of method and materialsdisclosed herein.

FIG. 10 is a perspective view of a newly constructed wood framed wallwith new cementitious wet-board wall surface installed and exposed,prior to future masonry veneer installation, made flood proof accordingto one embodiment of method and materials disclosed herein.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows the typical front elevation of a house with masonry veneersubstrate protected from flood waters by the method and materialsdisclosed herein. House 10 has windows 12, door 14, exterior masonryveneer substrate 16, which may also be stone, siding, or stucco, forexample, and concrete slab 19. Methods and materials disclosed hereinallow the windows 12, door 14 and exterior veneer finish 16 of house 10to be made impervious to rising water to a selected height H, aboveconcrete slab 19 by installing flood proof sections of windows 12 andflood doors 14 to the height H and by forming flood proof wainscot 18exterior to veneer 16 to height H. A system for flood proofing astructure such as a house must include flood proofing the exteriorveneer 16 and all openings in the structure to height H. A residentialstructure is illustrated in FIG. 1, but the structure may also be awarehouse, office structure, shopping center, church, or any otherstructure built on a concrete slab.

The height H of the wall surface to be flood-protected is preferablyselected according to anticipated flood conditions that may beexperienced and the load-bearing capacity of the frame of the building.The height to be flood protected will usually not be greater than 3 feetabove the concrete slab 19 on wood frame and light-gauge steel framebuildings, because of the limited strength of the structural frame.Strength enhancement options for increased flood height requirements maybe installed, allowing an increase in height H.

The order of application of the materials disclosed here may vary; themethod and materials will be described here beginning with theinstallation of replacement flood windows in an existing structure. Newconstruction methods will also be described in FIG. 10 to the extentthat they diverge from procedures for retrofitting an existingstructure.

Referring to FIG. 2, replacement window assembly 20 is shown, which is acustom flood window unit having glazing 22, which is preferablylaminated high impact-resistant safety glazing, with hydro-sealing ofthe glazing into the vinyl frame segment 27 a, as will be described inmore detail below. Frame segment 27 b may be a conventional framestructure with standard residential glazing features. Replacement windowassembly 20 is installed after an existing window has been removed fromthe rough opening. Glazing 22 extends from the bottom sill of window 20to height H. Horizontal mullion 24 divides glazing 22 from conventionalwindow structure 26. Frame 27 a and b may be formed from fusion-weldedvinyl material, which is standard in the residential window industry.

FIG. 3 shows a horizontal detailed cross-section view of a window andframe assembly and of the hydro-sealing structure for glazing 22. Theframe may be fastened into the existing rough window opening with 3-inchside-mounted coated wood screws 39. The perimeter of replacement windowassembly 20 is caulked, preferably with 100% silicone glass blockcaulking 35 a between rough framing members and vinyl frame segment 27 aand b, and then surface caulked with an elastomeric acrylic waterproofcaulk and sealant 35 b, such as PERMAPATCH, available from NationwideCoating Mfrs., Inc. of Sarasota, Fla. (herein “Nationwide”). To providefurther sealing, a 2-inch adhesive flashing strip 36, such as GraceVycor flashing, Quick Roof Flashing, available from Cofair Products,Inc., or equal, is heat applied and overlaid by a continuous filament,spun-laced fabric membrane 37, such as PERMATAPE, available fromNationwide. Fabric membrane 37 is saturated and sealed with anelastomeric waterproofing adhesive bonding primer, such as ACRYLOPRIMEsealer (available from Nationwide), overlapping the outer edge of thevinyl window frame and the adjacent wall substrate surface, preferably aminimum of ½ inch on the window frame and 1 inch on the adjacent wallsubstrate. The above process should be repeated for all window elementsextending below height H until the window retrofit procedure has beencompleted.

Window frame segment 34 is an extruded portion of the frame assembly,designated the “glazing backstop,” against which glazing 22 is sealedand compressed when pressure is applied from the window exterior.Double-stick glazing silicone base tape 35 c is applied continuously tobackstop 34 to prevent movement of the glazing once it is attached toframe 27 a. Premium glazing silicone sealant 32 is applied to backstop34 to further seal the glazing into place and to prevent water leakage.Exterior glazing trim 33 may be clipped into place and sealed withsilicone sealant 32. Special care is taken so as not to soil glazing 22with silicone sealant.

FIG. 4 illustrates replacement door assembly 40, which may be a new orexisting retrofitted door installed after an existing door and door jambhave been removed from the rough opening of a structure. Door 42 ispreferably supported in door jamb frame 49 by three (3) ball-bearingsurface mounted hinges 46 a. All steel surfaces are primed and paintedwith rust preventative products. Door 42 may contain raised panels 47top and bottom or bottom raised-panels. Door 42 may be insulated metalclad construction, insulated fiberglass clad construction, or solid woodconstruction with urethane applied as a surface coating (to wood doorsonly). In all cases, the lower door panel extending to height H, iswatertight and preferably has strength to resist impact from a floatingobject. The door is hinged to open outwardly. Standard new or existingdoor lockset device 46B may be utilized as a door locking mechanism.

Referring to FIGS. 5A and 5B, door flange frame 43, which may be about1½-inches wide, extends around the perimeter of the door and is mountedflush with the exterior surface of door 42 with the flange facing theinterior. Door 42 is mounted into door flange frame 43 using premiumpolyurethane construction adhesive between the frame and door surfaceedge and 2-inch coated wood screws 45 at 16-inch intervals. A continuoustwin strand of ⅜-inch by ⅜-inch rubber weatherseal gasket 48 (FIG. 5B),Thermal Blend, Inc. or equal, is glued with premium polyurethaneconstruction adhesive to the interior side of door flange frame 43 sothat the gasket compresses against the exterior surface of door jambframe 44 (a part of door jam frame 49 in FIG. 5A) when door 42 is in theclosed position. A single or more strand of weatherseal gasket may alsobe glued to the interior surface of door flange frame 43, as shown inFIG. 5B. FIG. 5A shows a lower cross-section view of door assembly 40when the door is in the closed position. Door assembly 40 is fastened toexisting house structure 50. FIG. 5B shows an enlarged cross-sectionview of door 42 with enhanced details of the gasket 48 features. Surface49 of door jamb frame 44 may be an existing surface of door jamb frame44 or may be provided by a metal or other material glued to door jambframe 44. Door assembly 40 is set into the rough-opening frame 50,plumbed and leveled utilizing wood shims if necessary, and anchored intoplace using 3-inch coated wood screws 51(a) side mounted into door jambframe 49 and existing wood frame 50. FIG. 5C shows a detail of thehinged side of door 42, with gasket 48 applied to this side also andinside flange 43.

The void between door jamb frame 49 and the existing opening framingmembers can be sealed with silicone sealant. All exterior surfaceperimeter joints around the door jamb frame 49 should be sealed with anelastomeric acrylic waterproof caulk and sealant compound 53 such asPERMAPATCH. To provide further sealing, a minimum 2-inch adhesiveflashing strip 54, such as Grace Vycor flashing, Quick Roof Flashing byCofair Products, Inc., or equal, is preferably heat applied and overlaidby a continuous filament, spun-laced fabric membrane 55, such asPERMATAPE, available from Nationwide. Fabric membrane 55 is thoroughlysaturated and sealed with an elastomeric waterproofing adhesive bondingprimer, such as ACRYLOPRIME sealer, overlapping the outer edge of thedoor jamb frame 49 and the adjacent wall substrate surface, preferably aminimum of 1-inch on the door frame and 1-inch on the adjacent wallsubstrate. The concrete slab area where the existing door sill wasremoved should be thoroughly cleaned and silicone sealant should beapplied immediately before installing replacement door assembly 40. Thedoor sill is firmly set onto previously applied silcone sealant. Thefront edge of door jamb frame 49 at the sill-to concrete slab jointshould be sealed to concrete slab 19 with silicone glass block caulking,taking care not to overlap any elastomeric acrylic caulk and sealantwith the silicone. The above installation process should be repeated forall exterior door elements extending below height H until the doorretrofit procedure has been completed.

FIG. 6 illustrates the position of a rubber weatherseal gasket 45 (whichmay be same as gasket 48 shown in FIG. 5) located on the interiorsurface of door flange frame 43, thus providing for compression againstthe surface face of door jamb frame 49 when the door is in the closedposition. The illustration shows masonry veneer substrate with floodproof wainscot 18 applied thereon.

Referring to FIG. 7, method and material for flood proofing masonry(brick) veneer substrate 70 is shown. In preparation for flood proofinga building having a concrete slab and any veneer substrate material onthe exterior walls, the following steps are taken: if less than 6 inchesof concrete slab surface area is exposed above existing grade, excavateas required to expose several inches, preferably about 6 inches, ofconcrete. Then power-wash the exposed slab and preferably the wallsurface areas to be flood-protected, using normal procedures.

Other steps to be taken before flood proofing a building using any ofthe methods and materials disclosed herein are to: relocate exteriorelectrical receptacles and other electrical apparatus which may belocated within the established flood zone wall surface area defined byheight H, temporarily remove other exterior wall surface mounted devicesfor reconnection after exterior wall coatings have been applied, andseal all remaining wall penetrations, preferably with an elastomericacrylic waterproof caulk and sealant such as PERMAPATCH.

Before beginning flood proofing of masonry veneer substrate 70, it ispreferable to saw-cut all protruding masonry window sills and raisedaccent appointments flush with the wall substrate surface within theflood zone area to insure a smooth and level finished surface area.

An exterior masonry veneer substrate typically possesses a 1-inchair-space 77 between the backside of the masonry substrate 70 and thewall board underlayment 78 attached to the wood frame structure. Thisair space must be filled solid with mold-resistant material 79, whichmay be a slurry admixture of sodium silicate and cement grout, up toheight H prior to the application of the flood protective materials. Allexisting masonry weep holes 70 a located at the base of the existingmasonry substrate should be filled to within 1-inch of the outer surfacewith 100% silicone caulking sealant. The balance of the opening willpreferably be smoothed over with masonry grout to match the existingmortar material and allowed to dry prior to pumping cement admixture 79into air-space cavity 77 through new weep holes 70 b drilled into theexisting mortar joints and located above height H. This procedure sealsoff potentially trapped moisture from the inner wall cavity and allowsair and moisture to circulate within the remaining portion of unsealedair-space to prevent mold growth.

Moisture- and mold-resistant cementitious wall board 72, which may be¼-inch or ½-inch HARDIBOARD Wet Area Cement Board, may be installed overthe entire wall surface area to be flood-protected, including an areaextending 3 inches below the intersection of wall substrate 70 andconcrete slab 19, referred to as base joint 75. Board 72 is thenpreferably attached to slab 19 using 2-inch masonry anchors 71. A 6-inchcontinuous strip of Adhesive Flashing 73, which may be Grace Vycorflashing, Quick Roof Flashing by Cofair Products, Inc., or equal, isapplied to slab 19 and board 72, preferably in a 50/50 percentage ofcoverage of each above and below base joint 75. A strip of PERMATAPE 74,saturated and sealed with ACRYLOPRIME, should be the applied,overlapping the top and bottom of the flashing.

All masonry door and window jamb and sill returns should be wrapped withwall board 72, fitting board 72 flush with door jamb frame 49 and windowsills/jambs, as shown in FIG. 5 and FIG. 2, and then the perimeter jointshould be caulked with an elastomeric acrylic waterproof caulk andsealant 35 b and 54, such as PERMAPATCH. Decorative styrofoam stuccomolding 76 may be installed across the top edge of cementitious wallboard 72 as a transition piece between old and flood-proofed substrates.Prior to the installation of flood protective coatings, all masonryanchor screws 71 should be sealed with PERMAPATCH.

A coat of elastomeric waterproofing bonding primer such as ACRYLOPRIMEsealer should preferably be applied evenly over cementitious wall board72. Then a decorative waterproof acrylic sand/knock-down/swirl texturecoating may be applied (by trowel or spray), such as ACRYLOSAND orACRYLOSTUK (available from Nationwide), in a selected pattern andtexture. Then a single coat of elastomeric adhesive waterproofing andbonding primer sealer, such as PERMABOND should be applied. Finally, twocoats of elastomeric acrylic ceramic polyurea finish-coat topping, suchas PERMAKOTE SUPER PLUS, color-matched as selected, should be applied.Normally, a minimum 12-hour curing time is allowed before all chemicalcoating applications

Referring to FIG. 8, concrete slab 19 of a building has existingstructural framing 91 supporting horizontal siding substrate 80. Thesame procedure and materials may be used for flood proofing as describedabove.

A 6-inch continuous strip of adhesive flashing 85 is applied evenly toslab 19 and board 82 intersection, over base joint 83. Base-jointflashing is then sealed with a strip of membrane 86 saturated and sealedwith sealer, overlapped top and bottom. Other coating and sealers may beapplied as described above. Decorative molding 87 may be added. If abuilding has concrete exterior siding, it may be flood proofed bycaulking, sealing, and coating of the existing substrate without theinstallation of the cement board underlayment and decorative texturedcoating finish disclosed above.

Referring to FIG. 9, concrete slab 19 of a building has existingstructural framing 91 supporting existing stucco substrate 92. A stripof adhesive flashing 94 is applied evenly to slab 19 and existing stuccosubstrate 92 as described above. Flashing 94 is covered with PERMATAPE95 saturated and sealed with sealer overlapped top and bottom asdescribed above. Molding 96 may be added as a decorative transitionpiece between existing textured stucco substrate 18 (above) and newlyapplied base-joint materials 95 (below). If not existing, styrofoamstucco molding 97 may be added as a transition agent at the top edge atheight H. A coat of elastomeric waterproofing bonding primer may beapplied, followed by two coats of elastomeric acrylic ceramic polyureafinish-coat topping, as described above.

Referring to FIG. 10, concrete slab 19 of a new residence underconstruction has new structural framing exposed with no wall veneermaterials yet installed. One-half inch or 1-inch cementitious wall board101 may be attached directly to new wood framing members 100 with 2-inchcoated wood screws 102. It is preferable that the building designassures placement of all windows above height H and therefore floodwindows will not be required. Should new flood windows be required forthe building design, steps illustrated in FIG. 2 and FIG. 3 for windowsand installation procedures should be followed. In addition, stepsillustrated in FIG. 4 for the installation of new flood doors should befollowed.

For base joint 103 flood protection, the following application ispreferred: a 6-inch continuous strip of adhesive flashing 104 is appliedevenly to slab 19 and cement wall board substrate 101 over new framing100, preferably in a 50/50 percentage of coverage of each above andbelow base joint 103. Flashing 104 is then sealed with a strip ofmembrane 105 saturated and sealed with sealer overlapped top and bottom,as described above. Horizontal brick ledge 106 may exist in lieu of avertical concrete slab 19 surface, in which case the above procedure mayencompass horizontal brick ledge 106 in addition to the vertical slabsurface as part of the flood protection procedure. Masonry elements willbe installed on top of flood protected horizontal brick ledge 106.

All wall board substrate 101 joints are sealed with a strip of membrane105 saturated and sealed with sealer. A coat of elastomericwaterproofing bonding primer, followed by two coats of elastomericacrylic ceramic polyurea finish-coat topping, such as PERMAKOTE SUPERPLUS (available from Nationwide), should be applied, as described above.In all installations using the method and materials disclosed herein,plumbing modifications are preferred. A 4-inch backflow preventiondevice with before/aft clean-out capability should be installed in themain sanitary sewer line between the house structure and the street. Anindividual anti-siphon back-flow prevention device should be installedon each exterior hose bib located within the flood zone. Also, allthru-wall penetrations for gas and plumbing should be sealed withPERMAPATCH caulk and sealant material prior to coating applicationprocedures and silicone caulking after completion of industrial coatingsapplication.

EXAMPLES

A model building was constructed according to the methods and materialsdescribed herein and tested under real-flood test conditions as follows:

Prototype I.

A concrete slab-on-grade residential foundation was constructed, 8 ft×8ft in dimension, with an exposed foundation 12 inches above the existinggrade. Thereafter, a wood-frame structure was constructed thereon usingstandard 2×4 stud framing at 16-inch on center, with a single base-plateattached to the concrete foundation with standard anchor bolts at 4 fton center, standard metal cross-bracing strips, a single 2×4 plate as aheader at the top of the 4 ft wall height, and exterior foil-facedparticle board sheathing applied to the exterior face of the studwall—all materials typically used in a wood framed residentialstructure.

Wall finishes typical to residential construction and additional specialfeatures were included in the prototype for testing as follows:

-   -   Standard masonry face-brick veneer was applied to the exterior        surface of one wall with a 1-inch air space between the brick        and the exterior wall sheathing and typical masonry ties and        weep holes included in the masonry installation.    -   Metal lath with a 1-inch stucco finish was applied as the        surface material on one wall.    -   Standard siding materials, HARDIPLANK in 4 ft×8 ft solid sheets        cut to size appropriate to the wall conditions were installed on        two separate walls.    -   One standard 3-ft wide door opening was provided for the testing        of various door samples.    -   One standard 4-ft wide window opening was provided for the        testing of various window samples.    -   A continuous 3-ft wide by 3-ft high waterproof moat was        constructed around the perimeter of the residential prototype        with the floor level of the moat 4 inches below the finish floor        level of the concrete foundation of the prototype in order to        accommodate foundation/wall base joint flood protection        requirements.

Flood protection methodologies were implemented and tested as follows:

-   -   The installation of one layer of Fiber Reinforced Polymer (FRP)        applied to the exterior wall surfaces of the prototype was        tested initially and although 100% successful under real-flood        test conditions to a flood height 3 ft above the foundation        level, the process was deemed too labor intensive, too climate        restrictive in the installation process, and too expensive due        to the requirement of extensive architectural finishing of the        flood protected area. The complete protection of wall-to-window        and wall-to-door joints also proved insufficient to prevent 100%        leakage due to the potential of minor shrinkage of the FRP        product during curing. Environmental-related issues also created        some concern due to the required use of epoxy products in the        procedure.    -   Once the above flood protective application procedures were        completed, the enclosed moat surrounding the prototype was        flooded to a height of 3 ft and sustained at that level for a        24-hour duration. There was zero leakage in the protective wall        finishes; however, various methodology adjustments were required        to prevent leakage around the door and window. Various door and        window components were installed within the prescribed prototype        openings. Surprisingly, in subsequent tests a 100% leak-free        structure was achieved using the methods and materials disclosed        herein.    -   The installation of the multi-stage protective coating system        disclosed here proved to be an excellent remedy as a durable,        environment friendly, easily applied, exterior wall surface        protective finish. The architectural finish is accomplished        within the water proof coating system itself, thus eliminating        the need for a separate surface finish process. The use of linen        mesh in sealing the foundation to wall base joint and the door        and window units into place in conjunction with the appropriate        coating materials provided a 100% leak-free solution.        Prototype II.

An existing free-standing concrete slab-on-grade garage structure with a½-inch×8-inch horizontal lap-and-gap HARDIPLANK siding exterior wasutilized as the second prototype for real-flood simulations. As withPrototype I, a 3-ft×3-ft continuous moat was constructed across an 8-ftsection of the rear wall of the existing building with the floor levelof the moat constructed 4 inches below the finished concrete floor levelof the existing garage. There was an existing troublesome base jointcondition to contend with; the concrete slab having a 2-inch bow in itdue to poor concrete forming when the building was originallyconstructed. This condition served to enhance our testing of floodprotection at the base joint utilizing the multi-stage coating system,and it provided a critical real-life condition that could reasonably beencountered in field conditions.

-   -   The existing siding material was tested in two ways:        -   (1) The existing horizontal HARDIPLANK siding, the            foundation/wall base joint, and all other joints and wall            penetrations were sealed and coated utilizing the system            disclosed herein without the installation of the wet board            underlayment product and the subsequent application of a            stucco wainscot architectural finish. This test proved that            existing HARDIPLANK siding can be flood-protected without            the additional cost of the architectural stucco wainscot            application. This represents a considerable cost savings for            buildings with existing HARDIPLANK siding on the exterior            walls.        -   (2) The existing horizontal HARDIPLANK siding was covered            with ½-inch wet board underlayment and then covered with the            multistage coating system and textured with a stucco finish            utilizing the system disclosed herein, including the            installation of decorative molding at the header of the new            stucco wainscot.    -   Both of the above applications were flooded to a height of 3 ft        for a 24-hour time period without any leakage into the interior        garage space. In addition, flood conditions to a height of 12        inches above the slab level were maintained for several months        without flooding at the critical base joint or through the        walls.

In addition to the above test, an existing 3 ft×6 ft−8 inches pedestriandoor providing entry into the garage area was retrofitted according tothe disclosure and tested independently by constructing a 4 ft×3 ft×3 ftmoat across the front of the retro-fitted door assembly after thecompleted installation. The door assembly was tested for a 24-hourperiod without leakage. This test proved that an existing door can beproperly modified and retro-fitted for use in the disclosed floodprotection system in addition to the use of a new flood door assembly.

It should be noted that several independent tests of door and windowassemblies were repeatedly tested utilizing the same procedures, eachtest documenting points of weakness and/or failure, until the discloseddoor and window systems were found to be waterproof.

Although the present invention has been described with respect tospecific details, it is not intended that such details should beregarded as limitations on the scope of the invention, except to theextent that they are included in the accompanying claims.

1. A waterproof building on a concrete slab having a building frame,comprising: an exterior substrate on the building frame and in contactwith the concrete slab, a strip of adhesive flashing overlapping aportion of the substrate and the concrete slab around the perimeter ofthe building, a first coating of waterproofing bonding primer over theadhesive flashing, a strip of continuous filament of fabric tapeoverlapping a top and bottom portion of the adhesive flashing, and asecond coating of waterproofing bonding primer over the fabric tape. 2.The building of claim 1 wherein the exterior substrate is formed of amoisture- and mold-resistant wall board.
 3. The waterproof buildingaccording to claim 1 and further including a wall board underlaymentattached to the building frame, an air space between the exteriorsubstrate and the wall board underlayment, and a solid filling of moldresistant material in the air space.
 4. The waterproof buildingaccording to claim 1 further including a coating of an elastomericadhesive waterproofing and bonding primer sealant over the exteriorsubstrate and first and second finishing coatings over the elastomericadhesive waterproofing and bonding primer sealer.
 5. A waterproofbuilding according to claim 4 wherein the finish coatings areelastomeric acrylic ceramic polyurea coatings.
 6. A waterproof buildingaccording to claim 1 further including a single finishing coating overthe exterior substrate.
 7. A waterproof building according, to claim 1further including an exterior door and door frame mounted to thebuilding frame so as to open outwardly of the building.
 8. The buildingof claim 7 further including a water-impervious seal between each doorframe and the building frame formed by a waterproof caulk and anadhesive flashing strip.
 9. A waterproof building on a concrete slabhaving, a building frame comprising: a wall board underlayment attachedto the building frame and contacting the concrete slab, a strip ofadhesive flashing overlapping a portion of the wall board underlaymentand the concrete slab, a first coating of waterproof bonding primer overthe adhesive flashing, a strip of continuous filament of fabric tapeoverlapping a top and bottom portion of the adhesive flashing, and asecond coating of waterproofing bonding primer over the fabric tape.